Hacktoberfest 2026 preparation — open PR cleanup tracker

This file tracks the cleanup of open pull requests ahead of Hacktoberfest 2026 so the queue is ready for the October influx of contributions.

Each of the scripts/close_pull_requests_with_*.sh jobs is run one at a time by a maintainer. After each run, the affected lines below are checked off ([ ] -> [x]), their labels replaced with "closed by <script name>", and the totals table at the bottom updated.

Snapshot taken: 2026-09-02 -- 918 open pull requests.

Latest refresh: 2026-09-06 -- reconciled the tracker with the live PR queue: 84 more tracked PRs are now resolved (10 merged: #13862, #13903, #14038, #14260, #14291, #14307, #14346, #14562, #14663, #15182; 74 closed). Approximately 669 pull requests remain open.

Notation: <index>. [ ] #<pr_id> <labels>

Open pull requests

Closed totals

Script	PRs closed
`close_pull_requests_with_awaiting_changes.sh`	0
`close_pull_requests_with_failing_tests.sh`	94
`close_pull_requests_with_require_descriptive_names.sh`	14
`close_pull_requests_with_require_tests.sh`	24
`close_pull_requests_with_require_type_hints.sh`	15
Total	147

Open pull requests grouped by algorithm directory

Generated by examining the changed files of every open PR. Each PR appears in exactly one grouping. PRs touching more than one algorithm directory are under "Modifies multiple algorithm directories"; PRs touching only non-algorithm paths (e.g. .github/, scripts/, docs/) are under "Modifies no algorithm directories"; PRs that touch DIRECTORY.md without touching an algorithm directory are under "Modifies DIRECTORY.md".

Total open pull requests: 770

audio_filters:

#14979 merged

backtracking:

bit_manipulation:

blockchain:

boolean_algebra:

cellular_automata:

#12109 closed by maintainer (superseded by #13146)
#13146 merged
#13827 merged

ciphers:

compression:

#11842
#12392

computer_vision:

control_algorithms:

#12648

conversions:

cpu_scheduling_algorithms:

#12140 closed

data_compression:

#14555
#14743
#14819
#14873

data_structures:

digital_image_processing:

#12275
#13141
#13149 merged

divide_and_conquer:

dynamic_programming:

electronics:

financial:

fractals:

#12091

full_wave_rectifier:

#9896 merged

genetic_algorithm:

#9577
#13234
#13645
#13647

geodesy:

#11648
#14351
#15056

geometry:

graphics:

graphs:

greedy_methods:

half_wave_rectifier:

#9388 merged

hashes:

haversine_calculation:

#13119 closed

height_tree:

#13172 closed

knapsack:

#10180
#12896

linear_algebra:

linear_programming:

#14607
#14613
#15047

machine_learning:

maths:

matrix:

networking_flow:

#13128

neural_network:

operating_system:

#11574 closed

os_py:

#13924 closed

other:

physics:

project_euler:

quantum:

#10624
#12317
#13033

recursions:

#12141 merged

scheduling:

#13896 merged

searches:

sorts:

strings:

tests:

#13231 merged

triage:

#14611 closed

web_programming:

Modifies multiple algorithm directories:

Modifies no algorithm directories:

Modifies DIRECTORY.md:

#13239 closed

Creates a new root directory

As requested by @cclauss on #15184: open PRs that add a new top-level directory to the repository (a directory that does not exist on master). These need a maintainer decision on whether the new category belongs in the collection before the code review matters, so they are grouped separately from the by-directory listing above. Each PR was confirmed to add at least one file under a top-level path that is absent from master.

Total PRs that create a new root directory: 13

compression:

#11842
#12392

control_algorithms:

#12648

cpu_scheduling_algorithms:

#12140 closed

full_wave_rectifier:

#9896 merged

half_wave_rectifier:

#9388 merged

haversine_calculation:

#13119 closed

height_tree:

#13172 closed

operating_system:

#11574 closed

os_py:

#13924 closed

recursions:

#12141 merged

tests:

#13231 merged

triage:

#14611 closed

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Hacktoberfest 2026 preparation — open PR cleanup tracker

Open pull requests

Closed totals

Open pull requests grouped by algorithm directory

Creates a new root directory

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Hacktoberfest 2026 preparation — open PR cleanup tracker

Open pull requests

Closed totals

Open pull requests grouped by algorithm directory

Creates a new root directory